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Leon

Electrical & computer engineer who loves old computers

Athens Greece

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This user joined on 10/31/2018.

My Projects

A 16-bit (and a 32bit) FPGA CPU I call Lion CPU and a computer, the Lion computer. Everything built from scratch.

Lion FPGA CPU/Computer

Qubide with 512K ram leaves a small amount of free ram to QL so this is a version with more ram and an expansion connector

QUBIDE clone with 640K or 704K ram upgrade for QL

It is a 1MByte flash cartridge, it supports standard 8K and 16K carts.

Multi-Cart for 8-bit Atari computers

Having burned two ZX8301 chips in the last years was a motive to make a cpld based replacement for the QL ZX8301 ULA.

ZX8301 replacement for Sinclair QL

A friend asked me to see why a video circuit for the pal version apple IIc didn't work, I designed a new video adapter for him.

Video adapter for PAL Apple IIc

This is my final ula replacement board for the ZX8301 ula of Sinclair QL. This one offers no optimizations but is compatible with SGC/GC.

Lion ULA - ZX8301 ULA for Sinclair QL

Projects I Contribute To

A Windows Emulator for the Lion FPGA CPU/Computer.

LionWin

My Lists

Retro Computer Projects

Projects related to retro computers, cards, accelerators, upgrades, cartridges, emulators, clones

Curated by Leon

Projects I Like & Follow

The 2018 Hackaday Prize

The Automatic Infinite 3D Printer (i3D) gives anyone the power of a factory.

Automatic Infinite 3D Printer

swaleh-owais Swaleh Owais

Game engine using a virtual machine with a simulator and a web compiler

Esp little game engine

Recreation of the 'Fastest computer in the Universe' that runs FORTH.

Recreating the Jupiter Ace

cees-meijer Cees Meijer

The 2017 Hackaday Prize

Low cost IDE/PATA disk emulator using a RPi Zero that also brings wireless networking to vintage computers.

NetPi-IDE

Hackaday Prize 2019

University digital Logic Learning Xtensible board release 3 with SDRAM

ULX3S powerful ECP5 board for open source FPGA

radionaorg radiona.org

I am building a computer featuring a 16-bit RISC CPU made of discrete transistors for learning, fun and art. It will be pretty large.

The Spikeputor

Writing on a whiteboard with stepper motors

Scribing Robot

Retro challenge 2017/04 project to create a TMS9900 compatible CPU core. Again in a month... Failure could be an option...

TMS9900 compatible CPU core in VHDL

erik-piehl Erik Piehl

68000 Retro Super Computer

Merlin

matthew-pearce Matthew Pearce

The memory systems of Altera Cyclone5 FPGAs have various features and limitations. I will not talk about the HPS here, only the FPGA.

Memory on Cyclone5 FPGA

bruce-land Bruce Land

A microcode compiler developed to fit into FPGA toolchain and validated to develop CDP1805-like CPU and text-based video controller

Microcoding for FPGAs

Cortex M0+, open source retro-gaming console, which connects to VGA and uses USB Gamepads/Keyboards.

uChip Simple VGA Console

nicola-wrachien Nicola Wrachien

Digital Information Processor - an 8-bit computer made out of 7400 series logic and some EEPROMs.

DIP-8 TTL Computer

16-bit computer system featuring a custom-designed CPU

LEO-1 Homebrew CPU

john-croudy John Croudy

I made a mouse droid companion for my R2-D2. Unlike its Death Star brethren that are all black, mine is a rusty one from Tatooine.

Star Wars Mouse Droid (Tatooine Edition)

Homebrew Retro-Inspired 32-bit CPU And Video Game System

Project Ember

A Windows Emulator for the Lion FPGA CPU/Computer.

LionWin

I'm not going to give up this time, I promise!

W-32 Z80 computer

buzz-pendarvis Buzz Pendarvis

View all

Bits

Dusan Petrovic wrote 03/25/2019 at 12:30

Hello Leon! Thank you for following my #Homebrew CPU list.

Are you sure? yes | no